| 1 | /* |
| 2 | * BabelTrace - Common Trace Format (CTF) |
| 3 | * |
| 4 | * Format registration. |
| 5 | * |
| 6 | * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation |
| 7 | * |
| 8 | * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 9 | * |
| 10 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 11 | * of this software and associated documentation files (the "Software"), to deal |
| 12 | * in the Software without restriction, including without limitation the rights |
| 13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 14 | * copies of the Software, and to permit persons to whom the Software is |
| 15 | * furnished to do so, subject to the following conditions: |
| 16 | * |
| 17 | * The above copyright notice and this permission notice shall be included in |
| 18 | * all copies or substantial portions of the Software. |
| 19 | */ |
| 20 | |
| 21 | #include <babeltrace/format.h> |
| 22 | #include <babeltrace/ctf/types.h> |
| 23 | #include <babeltrace/ctf/metadata.h> |
| 24 | #include <babeltrace/babeltrace.h> |
| 25 | #include <inttypes.h> |
| 26 | #include <stdio.h> |
| 27 | #include <uuid/uuid.h> |
| 28 | #include <sys/mman.h> |
| 29 | #include <errno.h> |
| 30 | #include <endian.h> |
| 31 | #include <sys/types.h> |
| 32 | #include <sys/stat.h> |
| 33 | #include <fcntl.h> |
| 34 | #include <dirent.h> |
| 35 | #include <glib.h> |
| 36 | #include <unistd.h> |
| 37 | #include <stdlib.h> |
| 38 | |
| 39 | #include "metadata/ctf-scanner.h" |
| 40 | #include "metadata/ctf-parser.h" |
| 41 | #include "metadata/ctf-ast.h" |
| 42 | |
| 43 | /* |
| 44 | * We currently simply map a page to read the packet header and packet |
| 45 | * context to get the packet length and content length. (in bits) |
| 46 | */ |
| 47 | #define MAX_PACKET_HEADER_LEN (getpagesize() * CHAR_BIT) |
| 48 | #define WRITE_PACKET_LEN (getpagesize() * 8 * CHAR_BIT) |
| 49 | #define UUID_LEN 16 /* uuid by value len */ |
| 50 | |
| 51 | #ifndef min |
| 52 | #define min(a, b) (((a) < (b)) ? (a) : (b)) |
| 53 | #endif |
| 54 | |
| 55 | extern int yydebug; |
| 56 | |
| 57 | static |
| 58 | struct trace_descriptor *ctf_open_trace(const char *path, int flags); |
| 59 | static |
| 60 | void ctf_close_trace(struct trace_descriptor *descriptor); |
| 61 | |
| 62 | static |
| 63 | rw_dispatch read_dispatch_table[] = { |
| 64 | [ CTF_TYPE_INTEGER ] = ctf_integer_read, |
| 65 | [ CTF_TYPE_FLOAT ] = ctf_float_read, |
| 66 | [ CTF_TYPE_ENUM ] = ctf_enum_read, |
| 67 | [ CTF_TYPE_STRING ] = ctf_string_read, |
| 68 | [ CTF_TYPE_STRUCT ] = ctf_struct_rw, |
| 69 | [ CTF_TYPE_VARIANT ] = ctf_variant_rw, |
| 70 | [ CTF_TYPE_ARRAY ] = ctf_array_read, |
| 71 | [ CTF_TYPE_SEQUENCE ] = ctf_sequence_read, |
| 72 | }; |
| 73 | |
| 74 | static |
| 75 | rw_dispatch write_dispatch_table[] = { |
| 76 | [ CTF_TYPE_INTEGER ] = ctf_integer_write, |
| 77 | [ CTF_TYPE_FLOAT ] = ctf_float_write, |
| 78 | [ CTF_TYPE_ENUM ] = ctf_enum_write, |
| 79 | [ CTF_TYPE_STRING ] = ctf_string_write, |
| 80 | [ CTF_TYPE_STRUCT ] = ctf_struct_rw, |
| 81 | [ CTF_TYPE_VARIANT ] = ctf_variant_rw, |
| 82 | [ CTF_TYPE_ARRAY ] = ctf_array_write, |
| 83 | [ CTF_TYPE_SEQUENCE ] = ctf_sequence_write, |
| 84 | }; |
| 85 | |
| 86 | static |
| 87 | struct format ctf_format = { |
| 88 | .open_trace = ctf_open_trace, |
| 89 | .close_trace = ctf_close_trace, |
| 90 | }; |
| 91 | |
| 92 | static |
| 93 | void ctf_update_timestamp(struct ctf_stream *stream, |
| 94 | struct definition_integer *integer_definition) |
| 95 | { |
| 96 | struct declaration_integer *integer_declaration = |
| 97 | integer_definition->declaration; |
| 98 | uint64_t oldval, newval, updateval; |
| 99 | |
| 100 | if (integer_declaration->len == 64) { |
| 101 | stream->timestamp = integer_definition->value._unsigned; |
| 102 | return; |
| 103 | } |
| 104 | /* keep low bits */ |
| 105 | oldval = stream->timestamp; |
| 106 | oldval &= (1ULL << integer_declaration->len) - 1; |
| 107 | newval = integer_definition->value._unsigned; |
| 108 | /* Test for overflow by comparing low bits */ |
| 109 | if (newval < oldval) |
| 110 | newval += 1ULL << integer_declaration->len; |
| 111 | /* updateval contains old high bits, and new low bits (sum) */ |
| 112 | updateval = stream->timestamp; |
| 113 | updateval &= ~((1ULL << integer_declaration->len) - 1); |
| 114 | updateval += newval; |
| 115 | stream->timestamp = updateval; |
| 116 | } |
| 117 | |
| 118 | static |
| 119 | int ctf_read_event(struct stream_pos *ppos, struct ctf_stream *stream) |
| 120 | { |
| 121 | struct ctf_stream_pos *pos = |
| 122 | container_of(ppos, struct ctf_stream_pos, parent); |
| 123 | struct ctf_stream_class *stream_class = stream->stream_class; |
| 124 | struct ctf_stream_event *event; |
| 125 | uint64_t id = 0; |
| 126 | int ret; |
| 127 | |
| 128 | ctf_pos_get_event(pos); |
| 129 | |
| 130 | if (pos->offset == EOF) |
| 131 | return EOF; |
| 132 | assert(pos->offset < pos->content_size); |
| 133 | |
| 134 | /* Read event header */ |
| 135 | if (stream->stream_event_header) { |
| 136 | struct definition_integer *integer_definition; |
| 137 | struct definition *variant; |
| 138 | |
| 139 | ret = generic_rw(ppos, &stream->stream_event_header->p); |
| 140 | if (ret) |
| 141 | goto error; |
| 142 | /* lookup event id */ |
| 143 | integer_definition = lookup_integer(&stream->stream_event_header->p, "id", FALSE); |
| 144 | if (integer_definition) { |
| 145 | id = integer_definition->value._unsigned; |
| 146 | } else { |
| 147 | struct definition_enum *enum_definition; |
| 148 | |
| 149 | enum_definition = lookup_enum(&stream->stream_event_header->p, "id", FALSE); |
| 150 | if (enum_definition) { |
| 151 | id = enum_definition->integer->value._unsigned; |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | variant = lookup_variant(&stream->stream_event_header->p, "v"); |
| 156 | if (variant) { |
| 157 | integer_definition = lookup_integer(variant, "id", FALSE); |
| 158 | if (integer_definition) { |
| 159 | id = integer_definition->value._unsigned; |
| 160 | } |
| 161 | } |
| 162 | stream->event_id = id; |
| 163 | |
| 164 | /* lookup timestamp */ |
| 165 | stream->has_timestamp = 0; |
| 166 | integer_definition = lookup_integer(&stream->stream_event_header->p, "timestamp", FALSE); |
| 167 | if (integer_definition) { |
| 168 | ctf_update_timestamp(stream, integer_definition); |
| 169 | stream->has_timestamp = 1; |
| 170 | } else { |
| 171 | if (variant) { |
| 172 | integer_definition = lookup_integer(variant, "timestamp", FALSE); |
| 173 | if (integer_definition) { |
| 174 | ctf_update_timestamp(stream, integer_definition); |
| 175 | stream->has_timestamp = 1; |
| 176 | } |
| 177 | } |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | /* Read stream-declared event context */ |
| 182 | if (stream->stream_event_context) { |
| 183 | ret = generic_rw(ppos, &stream->stream_event_context->p); |
| 184 | if (ret) |
| 185 | goto error; |
| 186 | } |
| 187 | |
| 188 | if (id >= stream_class->events_by_id->len) { |
| 189 | fprintf(stdout, "[error] Event id %" PRIu64 " is outside range.\n", id); |
| 190 | return -EINVAL; |
| 191 | } |
| 192 | event = g_ptr_array_index(stream->events_by_id, id); |
| 193 | if (!event) { |
| 194 | fprintf(stdout, "[error] Event id %" PRIu64 " is unknown.\n", id); |
| 195 | return -EINVAL; |
| 196 | } |
| 197 | |
| 198 | /* Read event-declared event context */ |
| 199 | if (event->event_context) { |
| 200 | ret = generic_rw(ppos, &event->event_context->p); |
| 201 | if (ret) |
| 202 | goto error; |
| 203 | } |
| 204 | |
| 205 | /* Read event payload */ |
| 206 | if (event->event_fields) { |
| 207 | ret = generic_rw(ppos, &event->event_fields->p); |
| 208 | if (ret) |
| 209 | goto error; |
| 210 | } |
| 211 | |
| 212 | return 0; |
| 213 | |
| 214 | error: |
| 215 | fprintf(stdout, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n"); |
| 216 | return ret; |
| 217 | } |
| 218 | |
| 219 | static |
| 220 | int ctf_write_event(struct stream_pos *pos, struct ctf_stream *stream) |
| 221 | { |
| 222 | struct ctf_stream_class *stream_class = stream->stream_class; |
| 223 | struct ctf_stream_event *event; |
| 224 | uint64_t id; |
| 225 | int ret; |
| 226 | |
| 227 | id = stream->event_id; |
| 228 | |
| 229 | /* print event header */ |
| 230 | if (stream->stream_event_header) { |
| 231 | ret = generic_rw(pos, &stream->stream_event_header->p); |
| 232 | if (ret) |
| 233 | goto error; |
| 234 | } |
| 235 | |
| 236 | /* print stream-declared event context */ |
| 237 | if (stream->stream_event_context) { |
| 238 | ret = generic_rw(pos, &stream->stream_event_context->p); |
| 239 | if (ret) |
| 240 | goto error; |
| 241 | } |
| 242 | |
| 243 | if (id >= stream_class->events_by_id->len) { |
| 244 | fprintf(stdout, "[error] Event id %" PRIu64 " is outside range.\n", id); |
| 245 | return -EINVAL; |
| 246 | } |
| 247 | event = g_ptr_array_index(stream->events_by_id, id); |
| 248 | if (!event) { |
| 249 | fprintf(stdout, "[error] Event id %" PRIu64 " is unknown.\n", id); |
| 250 | return -EINVAL; |
| 251 | } |
| 252 | |
| 253 | /* print event-declared event context */ |
| 254 | if (event->event_context) { |
| 255 | ret = generic_rw(pos, &event->event_context->p); |
| 256 | if (ret) |
| 257 | goto error; |
| 258 | } |
| 259 | |
| 260 | /* Read and print event payload */ |
| 261 | if (event->event_fields) { |
| 262 | ret = generic_rw(pos, &event->event_fields->p); |
| 263 | if (ret) |
| 264 | goto error; |
| 265 | } |
| 266 | |
| 267 | return 0; |
| 268 | |
| 269 | error: |
| 270 | fprintf(stdout, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n"); |
| 271 | return ret; |
| 272 | } |
| 273 | |
| 274 | void ctf_init_pos(struct ctf_stream_pos *pos, int fd, int open_flags) |
| 275 | { |
| 276 | pos->fd = fd; |
| 277 | pos->mmap_offset = 0; |
| 278 | pos->packet_size = 0; |
| 279 | pos->content_size = 0; |
| 280 | pos->content_size_loc = NULL; |
| 281 | pos->base = NULL; |
| 282 | pos->offset = 0; |
| 283 | pos->dummy = false; |
| 284 | pos->cur_index = 0; |
| 285 | if (fd >= 0) |
| 286 | pos->packet_index = g_array_new(FALSE, TRUE, |
| 287 | sizeof(struct packet_index)); |
| 288 | else |
| 289 | pos->packet_index = NULL; |
| 290 | switch (open_flags & O_ACCMODE) { |
| 291 | case O_RDONLY: |
| 292 | pos->prot = PROT_READ; |
| 293 | pos->flags = MAP_PRIVATE; |
| 294 | pos->parent.rw_table = read_dispatch_table; |
| 295 | pos->parent.event_cb = ctf_read_event; |
| 296 | break; |
| 297 | case O_RDWR: |
| 298 | pos->prot = PROT_WRITE; /* Write has priority */ |
| 299 | pos->flags = MAP_SHARED; |
| 300 | pos->parent.rw_table = write_dispatch_table; |
| 301 | pos->parent.event_cb = ctf_write_event; |
| 302 | if (fd >= 0) |
| 303 | ctf_move_pos_slow(pos, 0, SEEK_SET); /* position for write */ |
| 304 | break; |
| 305 | default: |
| 306 | assert(0); |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | void ctf_fini_pos(struct ctf_stream_pos *pos) |
| 311 | { |
| 312 | int ret; |
| 313 | |
| 314 | if (pos->prot == PROT_WRITE && pos->content_size_loc) |
| 315 | *pos->content_size_loc = pos->offset; |
| 316 | if (pos->base) { |
| 317 | /* unmap old base */ |
| 318 | ret = munmap(pos->base, pos->packet_size / CHAR_BIT); |
| 319 | if (ret) { |
| 320 | fprintf(stdout, "[error] Unable to unmap old base: %s.\n", |
| 321 | strerror(errno)); |
| 322 | assert(0); |
| 323 | } |
| 324 | } |
| 325 | (void) g_array_free(pos->packet_index, TRUE); |
| 326 | } |
| 327 | |
| 328 | void ctf_move_pos_slow(struct ctf_stream_pos *pos, size_t offset, int whence) |
| 329 | { |
| 330 | struct ctf_file_stream *file_stream = |
| 331 | container_of(pos, struct ctf_file_stream, pos); |
| 332 | int ret; |
| 333 | off_t off; |
| 334 | struct packet_index *index; |
| 335 | |
| 336 | if (pos->prot == PROT_WRITE && pos->content_size_loc) |
| 337 | *pos->content_size_loc = pos->offset; |
| 338 | |
| 339 | if (pos->base) { |
| 340 | /* unmap old base */ |
| 341 | ret = munmap(pos->base, pos->packet_size / CHAR_BIT); |
| 342 | if (ret) { |
| 343 | fprintf(stdout, "[error] Unable to unmap old base: %s.\n", |
| 344 | strerror(errno)); |
| 345 | assert(0); |
| 346 | } |
| 347 | pos->base = NULL; |
| 348 | } |
| 349 | |
| 350 | /* |
| 351 | * The caller should never ask for ctf_move_pos across packets, |
| 352 | * except to get exactly at the beginning of the next packet. |
| 353 | */ |
| 354 | if (pos->prot == PROT_WRITE) { |
| 355 | switch (whence) { |
| 356 | case SEEK_CUR: |
| 357 | /* The writer will add padding */ |
| 358 | assert(pos->offset + offset == pos->packet_size); |
| 359 | pos->mmap_offset += WRITE_PACKET_LEN / CHAR_BIT; |
| 360 | break; |
| 361 | case SEEK_SET: |
| 362 | assert(offset == 0); /* only seek supported for now */ |
| 363 | pos->cur_index = 0; |
| 364 | break; |
| 365 | default: |
| 366 | assert(0); |
| 367 | } |
| 368 | pos->content_size = -1U; /* Unknown at this point */ |
| 369 | pos->packet_size = WRITE_PACKET_LEN; |
| 370 | off = posix_fallocate(pos->fd, pos->mmap_offset, |
| 371 | pos->packet_size / CHAR_BIT); |
| 372 | assert(off >= 0); |
| 373 | pos->offset = 0; |
| 374 | } else { |
| 375 | read_next_packet: |
| 376 | switch (whence) { |
| 377 | case SEEK_CUR: |
| 378 | if (pos->offset == EOF) |
| 379 | return; |
| 380 | /* The reader will expect us to skip padding */ |
| 381 | assert(pos->offset + offset == pos->content_size); |
| 382 | ++pos->cur_index; |
| 383 | break; |
| 384 | case SEEK_SET: |
| 385 | assert(offset == 0); /* only seek supported for now */ |
| 386 | pos->cur_index = 0; |
| 387 | break; |
| 388 | default: |
| 389 | assert(0); |
| 390 | } |
| 391 | if (pos->cur_index >= pos->packet_index->len) { |
| 392 | pos->offset = EOF; |
| 393 | return; |
| 394 | } |
| 395 | index = &g_array_index(pos->packet_index, struct packet_index, |
| 396 | pos->cur_index); |
| 397 | pos->mmap_offset = index->offset; |
| 398 | |
| 399 | /* Lookup context/packet size in index */ |
| 400 | file_stream->parent.timestamp = index->timestamp_begin; |
| 401 | pos->content_size = index->content_size; |
| 402 | pos->packet_size = index->packet_size; |
| 403 | if (index->data_offset < index->content_size) { |
| 404 | pos->offset = 0; /* will read headers */ |
| 405 | } else if (index->data_offset == index->content_size) { |
| 406 | /* empty packet */ |
| 407 | pos->offset = index->data_offset; |
| 408 | offset = 0; |
| 409 | goto read_next_packet; |
| 410 | } else { |
| 411 | pos->offset = EOF; |
| 412 | return; |
| 413 | } |
| 414 | } |
| 415 | /* map new base. Need mapping length from header. */ |
| 416 | pos->base = mmap(NULL, pos->packet_size / CHAR_BIT, pos->prot, |
| 417 | pos->flags, pos->fd, pos->mmap_offset); |
| 418 | if (pos->base == MAP_FAILED) { |
| 419 | fprintf(stdout, "[error] mmap error %s.\n", |
| 420 | strerror(errno)); |
| 421 | assert(0); |
| 422 | } |
| 423 | |
| 424 | /* update trace_packet_header and stream_packet_context */ |
| 425 | if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) { |
| 426 | /* Read packet header */ |
| 427 | ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p); |
| 428 | assert(!ret); |
| 429 | } |
| 430 | if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) { |
| 431 | /* Read packet context */ |
| 432 | ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p); |
| 433 | assert(!ret); |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | static |
| 438 | int packet_metadata(struct ctf_trace *td, FILE *fp) |
| 439 | { |
| 440 | uint32_t magic; |
| 441 | size_t len; |
| 442 | int ret = 0; |
| 443 | |
| 444 | len = fread(&magic, sizeof(magic), 1, fp); |
| 445 | if (len != 1) { |
| 446 | goto end; |
| 447 | } |
| 448 | if (magic == TSDL_MAGIC) { |
| 449 | ret = 1; |
| 450 | td->byte_order = BYTE_ORDER; |
| 451 | CTF_TRACE_SET_FIELD(td, byte_order); |
| 452 | } else if (magic == GUINT32_SWAP_LE_BE(TSDL_MAGIC)) { |
| 453 | ret = 1; |
| 454 | td->byte_order = (BYTE_ORDER == BIG_ENDIAN) ? |
| 455 | LITTLE_ENDIAN : BIG_ENDIAN; |
| 456 | CTF_TRACE_SET_FIELD(td, byte_order); |
| 457 | } |
| 458 | end: |
| 459 | rewind(fp); |
| 460 | return ret; |
| 461 | } |
| 462 | |
| 463 | /* |
| 464 | * Returns 0 on success, -1 on error. |
| 465 | */ |
| 466 | static |
| 467 | int check_version(unsigned int major, unsigned int minor) |
| 468 | { |
| 469 | switch (major) { |
| 470 | case 1: |
| 471 | switch (minor) { |
| 472 | case 8: |
| 473 | return 0; |
| 474 | default: |
| 475 | goto warning; |
| 476 | } |
| 477 | default: |
| 478 | goto warning; |
| 479 | |
| 480 | } |
| 481 | |
| 482 | /* eventually return an error instead of warning */ |
| 483 | warning: |
| 484 | fprintf(stdout, "[warning] Unsupported CTF specification version %u.%u. Trying anyway.\n", |
| 485 | major, minor); |
| 486 | return 0; |
| 487 | } |
| 488 | |
| 489 | static |
| 490 | int ctf_open_trace_metadata_packet_read(struct ctf_trace *td, FILE *in, |
| 491 | FILE *out) |
| 492 | { |
| 493 | struct metadata_packet_header header; |
| 494 | size_t readlen, writelen, toread; |
| 495 | char buf[4096 + 1]; /* + 1 for debug-mode \0 */ |
| 496 | int ret = 0; |
| 497 | |
| 498 | readlen = fread(&header, header_sizeof(header), 1, in); |
| 499 | if (readlen < 1) |
| 500 | return -EINVAL; |
| 501 | |
| 502 | if (td->byte_order != BYTE_ORDER) { |
| 503 | header.magic = GUINT32_SWAP_LE_BE(header.magic); |
| 504 | header.checksum = GUINT32_SWAP_LE_BE(header.checksum); |
| 505 | header.content_size = GUINT32_SWAP_LE_BE(header.content_size); |
| 506 | header.packet_size = GUINT32_SWAP_LE_BE(header.packet_size); |
| 507 | } |
| 508 | if (header.checksum) |
| 509 | fprintf(stdout, "[warning] checksum verification not supported yet.\n"); |
| 510 | if (header.compression_scheme) { |
| 511 | fprintf(stdout, "[error] compression (%u) not supported yet.\n", |
| 512 | header.compression_scheme); |
| 513 | return -EINVAL; |
| 514 | } |
| 515 | if (header.encryption_scheme) { |
| 516 | fprintf(stdout, "[error] encryption (%u) not supported yet.\n", |
| 517 | header.encryption_scheme); |
| 518 | return -EINVAL; |
| 519 | } |
| 520 | if (header.checksum_scheme) { |
| 521 | fprintf(stdout, "[error] checksum (%u) not supported yet.\n", |
| 522 | header.checksum_scheme); |
| 523 | return -EINVAL; |
| 524 | } |
| 525 | if (check_version(header.major, header.minor) < 0) |
| 526 | return -EINVAL; |
| 527 | if (!CTF_TRACE_FIELD_IS_SET(td, uuid)) { |
| 528 | memcpy(td->uuid, header.uuid, sizeof(header.uuid)); |
| 529 | CTF_TRACE_SET_FIELD(td, uuid); |
| 530 | } else { |
| 531 | if (uuid_compare(header.uuid, td->uuid)) |
| 532 | return -EINVAL; |
| 533 | } |
| 534 | |
| 535 | toread = (header.content_size / CHAR_BIT) - header_sizeof(header); |
| 536 | |
| 537 | for (;;) { |
| 538 | readlen = fread(buf, sizeof(char), min(sizeof(buf) - 1, toread), in); |
| 539 | if (ferror(in)) { |
| 540 | ret = -EINVAL; |
| 541 | break; |
| 542 | } |
| 543 | if (babeltrace_debug) { |
| 544 | buf[readlen] = '\0'; |
| 545 | fprintf(stdout, "[debug] metadata packet read: %s\n", |
| 546 | buf); |
| 547 | } |
| 548 | |
| 549 | writelen = fwrite(buf, sizeof(char), readlen, out); |
| 550 | if (writelen < readlen) { |
| 551 | ret = -EIO; |
| 552 | break; |
| 553 | } |
| 554 | if (ferror(out)) { |
| 555 | ret = -EINVAL; |
| 556 | break; |
| 557 | } |
| 558 | toread -= readlen; |
| 559 | if (!toread) { |
| 560 | ret = 0; /* continue reading next packet */ |
| 561 | goto read_padding; |
| 562 | } |
| 563 | } |
| 564 | return ret; |
| 565 | |
| 566 | read_padding: |
| 567 | toread = (header.packet_size - header.content_size) / CHAR_BIT; |
| 568 | ret = fseek(in, toread, SEEK_CUR); |
| 569 | if (ret < 0) { |
| 570 | fprintf(stdout, "[warning] Missing padding at end of file\n"); |
| 571 | ret = 0; |
| 572 | } |
| 573 | return ret; |
| 574 | } |
| 575 | |
| 576 | static |
| 577 | int ctf_open_trace_metadata_stream_read(struct ctf_trace *td, FILE **fp, |
| 578 | char **buf) |
| 579 | { |
| 580 | FILE *in, *out; |
| 581 | size_t size; |
| 582 | int ret; |
| 583 | |
| 584 | in = *fp; |
| 585 | /* |
| 586 | * Using strlen on *buf instead of size of open_memstream |
| 587 | * because its size includes garbage at the end (after final |
| 588 | * \0). This is the allocated size, not the actual string size. |
| 589 | */ |
| 590 | out = open_memstream(buf, &size); |
| 591 | if (out == NULL) |
| 592 | return -errno; |
| 593 | |
| 594 | for (;;) { |
| 595 | ret = ctf_open_trace_metadata_packet_read(td, in, out); |
| 596 | if (ret) { |
| 597 | break; |
| 598 | } |
| 599 | if (feof(in)) { |
| 600 | ret = 0; |
| 601 | break; |
| 602 | } |
| 603 | } |
| 604 | fclose(out); /* flush the buffer */ |
| 605 | fclose(in); |
| 606 | /* open for reading */ |
| 607 | *fp = fmemopen(*buf, strlen(*buf), "rb"); |
| 608 | return 0; |
| 609 | } |
| 610 | |
| 611 | static |
| 612 | int ctf_open_trace_metadata_read(struct ctf_trace *td) |
| 613 | { |
| 614 | struct ctf_scanner *scanner; |
| 615 | struct ctf_file_stream *metadata_stream; |
| 616 | FILE *fp; |
| 617 | char *buf = NULL; |
| 618 | int ret = 0; |
| 619 | |
| 620 | metadata_stream = g_new0(struct ctf_file_stream, 1); |
| 621 | td->metadata = &metadata_stream->parent; |
| 622 | metadata_stream->pos.fd = openat(td->dirfd, "metadata", O_RDONLY); |
| 623 | if (metadata_stream->pos.fd < 0) { |
| 624 | fprintf(stdout, "Unable to open metadata.\n"); |
| 625 | return metadata_stream->pos.fd; |
| 626 | } |
| 627 | |
| 628 | if (babeltrace_debug) |
| 629 | yydebug = 1; |
| 630 | |
| 631 | fp = fdopen(metadata_stream->pos.fd, "r"); |
| 632 | if (!fp) { |
| 633 | fprintf(stdout, "[error] Unable to open metadata stream.\n"); |
| 634 | ret = -errno; |
| 635 | goto end_stream; |
| 636 | } |
| 637 | |
| 638 | if (packet_metadata(td, fp)) { |
| 639 | ret = ctf_open_trace_metadata_stream_read(td, &fp, &buf); |
| 640 | if (ret) |
| 641 | goto end_packet_read; |
| 642 | } else { |
| 643 | unsigned int major, minor; |
| 644 | ssize_t nr_items; |
| 645 | |
| 646 | td->byte_order = BYTE_ORDER; |
| 647 | |
| 648 | /* Check text-only metadata header and version */ |
| 649 | nr_items = fscanf(fp, "/* CTF %u.%u", &major, &minor); |
| 650 | if (nr_items < 2) |
| 651 | fprintf(stdout, "[warning] Ill-shapen or missing \"/* CTF x.y\" header for text-only metadata.\n"); |
| 652 | if (check_version(major, minor) < 0) { |
| 653 | ret = -EINVAL; |
| 654 | goto end_packet_read; |
| 655 | } |
| 656 | rewind(fp); |
| 657 | } |
| 658 | |
| 659 | scanner = ctf_scanner_alloc(fp); |
| 660 | if (!scanner) { |
| 661 | fprintf(stdout, "[error] Error allocating scanner\n"); |
| 662 | ret = -ENOMEM; |
| 663 | goto end_scanner_alloc; |
| 664 | } |
| 665 | ret = ctf_scanner_append_ast(scanner); |
| 666 | if (ret) { |
| 667 | fprintf(stdout, "[error] Error creating AST\n"); |
| 668 | goto end; |
| 669 | } |
| 670 | |
| 671 | if (babeltrace_debug) { |
| 672 | ret = ctf_visitor_print_xml(stdout, 0, &scanner->ast->root); |
| 673 | if (ret) { |
| 674 | fprintf(stdout, "[error] Error visiting AST for XML output\n"); |
| 675 | goto end; |
| 676 | } |
| 677 | } |
| 678 | |
| 679 | ret = ctf_visitor_semantic_check(stdout, 0, &scanner->ast->root); |
| 680 | if (ret) { |
| 681 | fprintf(stdout, "[error] Error in CTF semantic validation %d\n", ret); |
| 682 | goto end; |
| 683 | } |
| 684 | ret = ctf_visitor_construct_metadata(stdout, 0, &scanner->ast->root, |
| 685 | td, td->byte_order); |
| 686 | if (ret) { |
| 687 | fprintf(stdout, "[error] Error in CTF metadata constructor %d\n", ret); |
| 688 | goto end; |
| 689 | } |
| 690 | end: |
| 691 | ctf_scanner_free(scanner); |
| 692 | end_scanner_alloc: |
| 693 | end_packet_read: |
| 694 | fclose(fp); |
| 695 | free(buf); |
| 696 | end_stream: |
| 697 | close(metadata_stream->pos.fd); |
| 698 | if (ret) |
| 699 | g_free(metadata_stream); |
| 700 | return ret; |
| 701 | } |
| 702 | |
| 703 | static |
| 704 | struct ctf_stream_event *create_event_definitions(struct ctf_trace *td, |
| 705 | struct ctf_stream *stream, |
| 706 | struct ctf_event *event) |
| 707 | { |
| 708 | struct ctf_stream_event *stream_event = g_new0(struct ctf_stream_event, 1); |
| 709 | |
| 710 | if (event->context_decl) { |
| 711 | struct definition *definition = |
| 712 | event->context_decl->p.definition_new(&event->context_decl->p, |
| 713 | stream->parent_def_scope, 0, 0, "event.context"); |
| 714 | if (!definition) { |
| 715 | goto error; |
| 716 | } |
| 717 | stream_event->event_context = container_of(definition, |
| 718 | struct definition_struct, p); |
| 719 | stream->parent_def_scope = stream_event->event_context->p.scope; |
| 720 | } |
| 721 | if (event->fields_decl) { |
| 722 | struct definition *definition = |
| 723 | event->fields_decl->p.definition_new(&event->fields_decl->p, |
| 724 | stream->parent_def_scope, 0, 0, "event.fields"); |
| 725 | if (!definition) { |
| 726 | goto error; |
| 727 | } |
| 728 | stream_event->event_fields = container_of(definition, |
| 729 | struct definition_struct, p); |
| 730 | stream->parent_def_scope = stream_event->event_fields->p.scope; |
| 731 | } |
| 732 | return stream_event; |
| 733 | |
| 734 | error: |
| 735 | if (stream_event->event_fields) |
| 736 | definition_unref(&stream_event->event_fields->p); |
| 737 | if (stream_event->event_context) |
| 738 | definition_unref(&stream_event->event_context->p); |
| 739 | return NULL; |
| 740 | } |
| 741 | |
| 742 | static |
| 743 | int create_stream_definitions(struct ctf_trace *td, struct ctf_stream *stream) |
| 744 | { |
| 745 | struct ctf_stream_class *stream_class; |
| 746 | int ret; |
| 747 | int i; |
| 748 | |
| 749 | if (stream->stream_definitions_created) |
| 750 | return 0; |
| 751 | |
| 752 | stream_class = stream->stream_class; |
| 753 | |
| 754 | if (stream_class->packet_context_decl) { |
| 755 | struct definition *definition = |
| 756 | stream_class->packet_context_decl->p.definition_new(&stream_class->packet_context_decl->p, |
| 757 | stream->parent_def_scope, 0, 0, "stream.packet.context"); |
| 758 | if (!definition) { |
| 759 | ret = -EINVAL; |
| 760 | goto error; |
| 761 | } |
| 762 | stream->stream_packet_context = container_of(definition, |
| 763 | struct definition_struct, p); |
| 764 | stream->parent_def_scope = stream->stream_packet_context->p.scope; |
| 765 | } |
| 766 | if (stream_class->event_header_decl) { |
| 767 | struct definition *definition = |
| 768 | stream_class->event_header_decl->p.definition_new(&stream_class->event_header_decl->p, |
| 769 | stream->parent_def_scope, 0, 0, "stream.event.header"); |
| 770 | if (!definition) { |
| 771 | ret = -EINVAL; |
| 772 | goto error; |
| 773 | } |
| 774 | stream->stream_event_header = |
| 775 | container_of(definition, struct definition_struct, p); |
| 776 | stream->parent_def_scope = stream->stream_event_header->p.scope; |
| 777 | } |
| 778 | if (stream_class->event_context_decl) { |
| 779 | struct definition *definition = |
| 780 | stream_class->event_context_decl->p.definition_new(&stream_class->event_context_decl->p, |
| 781 | stream->parent_def_scope, 0, 0, "stream.event.context"); |
| 782 | if (!definition) { |
| 783 | ret = -EINVAL; |
| 784 | goto error; |
| 785 | } |
| 786 | stream->stream_event_context = |
| 787 | container_of(definition, struct definition_struct, p); |
| 788 | stream->parent_def_scope = stream->stream_event_context->p.scope; |
| 789 | } |
| 790 | stream->events_by_id = g_ptr_array_new(); |
| 791 | g_ptr_array_set_size(stream->events_by_id, stream_class->events_by_id->len); |
| 792 | for (i = 0; i < stream->events_by_id->len; i++) { |
| 793 | struct ctf_event *event = g_ptr_array_index(stream_class->events_by_id, i); |
| 794 | struct ctf_stream_event *stream_event; |
| 795 | |
| 796 | if (!event) |
| 797 | continue; |
| 798 | stream_event = create_event_definitions(td, stream, event); |
| 799 | if (!stream_event) |
| 800 | goto error_event; |
| 801 | g_ptr_array_index(stream->events_by_id, i) = stream_event; |
| 802 | } |
| 803 | return 0; |
| 804 | |
| 805 | error_event: |
| 806 | for (i = 0; i < stream->events_by_id->len; i++) { |
| 807 | struct ctf_stream_event *stream_event = g_ptr_array_index(stream->events_by_id, i); |
| 808 | if (stream_event) |
| 809 | g_free(stream_event); |
| 810 | } |
| 811 | g_ptr_array_free(stream->events_by_id, TRUE); |
| 812 | error: |
| 813 | if (stream->stream_event_context) |
| 814 | definition_unref(&stream->stream_event_context->p); |
| 815 | if (stream->stream_event_header) |
| 816 | definition_unref(&stream->stream_event_header->p); |
| 817 | if (stream->stream_packet_context) |
| 818 | definition_unref(&stream->stream_packet_context->p); |
| 819 | return ret; |
| 820 | } |
| 821 | |
| 822 | |
| 823 | static |
| 824 | int create_stream_packet_index(struct ctf_trace *td, |
| 825 | struct ctf_file_stream *file_stream) |
| 826 | { |
| 827 | struct ctf_stream_class *stream; |
| 828 | int len_index; |
| 829 | struct ctf_stream_pos *pos; |
| 830 | struct stat filestats; |
| 831 | struct packet_index packet_index; |
| 832 | int first_packet = 1; |
| 833 | int ret; |
| 834 | |
| 835 | pos = &file_stream->pos; |
| 836 | |
| 837 | ret = fstat(pos->fd, &filestats); |
| 838 | if (ret < 0) |
| 839 | return ret; |
| 840 | |
| 841 | if (filestats.st_size < MAX_PACKET_HEADER_LEN / CHAR_BIT) |
| 842 | return -EINVAL; |
| 843 | |
| 844 | for (pos->mmap_offset = 0; pos->mmap_offset < filestats.st_size; ) { |
| 845 | uint64_t stream_id = 0; |
| 846 | |
| 847 | if (pos->base) { |
| 848 | /* unmap old base */ |
| 849 | ret = munmap(pos->base, pos->packet_size / CHAR_BIT); |
| 850 | if (ret) { |
| 851 | fprintf(stdout, "[error] Unable to unmap old base: %s.\n", |
| 852 | strerror(errno)); |
| 853 | return ret; |
| 854 | } |
| 855 | pos->base = NULL; |
| 856 | } |
| 857 | /* map new base. Need mapping length from header. */ |
| 858 | pos->base = mmap(NULL, MAX_PACKET_HEADER_LEN / CHAR_BIT, PROT_READ, |
| 859 | MAP_PRIVATE, pos->fd, pos->mmap_offset); |
| 860 | pos->content_size = MAX_PACKET_HEADER_LEN; /* Unknown at this point */ |
| 861 | pos->packet_size = MAX_PACKET_HEADER_LEN; /* Unknown at this point */ |
| 862 | pos->offset = 0; /* Position of the packet header */ |
| 863 | |
| 864 | packet_index.offset = pos->mmap_offset; |
| 865 | packet_index.content_size = 0; |
| 866 | packet_index.packet_size = 0; |
| 867 | packet_index.timestamp_begin = 0; |
| 868 | packet_index.timestamp_end = 0; |
| 869 | |
| 870 | /* read and check header, set stream id (and check) */ |
| 871 | if (file_stream->parent.trace_packet_header) { |
| 872 | /* Read packet header */ |
| 873 | ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p); |
| 874 | if (ret) |
| 875 | return ret; |
| 876 | len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("magic")); |
| 877 | if (len_index >= 0) { |
| 878 | struct definition_integer *defint; |
| 879 | struct definition *field; |
| 880 | |
| 881 | field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index); |
| 882 | assert(field->declaration->id == CTF_TYPE_INTEGER); |
| 883 | defint = container_of(field, struct definition_integer, p); |
| 884 | assert(defint->declaration->signedness == FALSE); |
| 885 | if (defint->value._unsigned != CTF_MAGIC) { |
| 886 | fprintf(stdout, "[error] Invalid magic number 0x%" PRIX64 " at packet %u (file offset %zd).\n", |
| 887 | defint->value._unsigned, |
| 888 | file_stream->pos.packet_index->len, |
| 889 | (ssize_t) pos->mmap_offset); |
| 890 | return -EINVAL; |
| 891 | } |
| 892 | } |
| 893 | |
| 894 | /* check uuid */ |
| 895 | len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("uuid")); |
| 896 | if (len_index >= 0) { |
| 897 | struct definition_array *defarray; |
| 898 | struct definition *field; |
| 899 | uint64_t i; |
| 900 | uint8_t uuidval[UUID_LEN]; |
| 901 | |
| 902 | field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index); |
| 903 | assert(field->declaration->id == CTF_TYPE_ARRAY); |
| 904 | defarray = container_of(field, struct definition_array, p); |
| 905 | assert(array_len(defarray) == UUID_LEN); |
| 906 | assert(defarray->declaration->elem->id == CTF_TYPE_INTEGER); |
| 907 | |
| 908 | for (i = 0; i < UUID_LEN; i++) { |
| 909 | struct definition *elem; |
| 910 | struct definition_integer *defint; |
| 911 | |
| 912 | elem = array_index(defarray, i); |
| 913 | assert(elem); |
| 914 | defint = container_of(elem, struct definition_integer, p); |
| 915 | uuidval[i] = defint->value._unsigned; |
| 916 | } |
| 917 | ret = uuid_compare(td->uuid, uuidval); |
| 918 | if (ret) { |
| 919 | fprintf(stdout, "[error] Unique Universal Identifiers do not match.\n"); |
| 920 | return -EINVAL; |
| 921 | } |
| 922 | } |
| 923 | |
| 924 | |
| 925 | len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("stream_id")); |
| 926 | if (len_index >= 0) { |
| 927 | struct definition_integer *defint; |
| 928 | struct definition *field; |
| 929 | |
| 930 | field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index); |
| 931 | assert(field->declaration->id == CTF_TYPE_INTEGER); |
| 932 | defint = container_of(field, struct definition_integer, p); |
| 933 | assert(defint->declaration->signedness == FALSE); |
| 934 | stream_id = defint->value._unsigned; |
| 935 | } |
| 936 | } |
| 937 | |
| 938 | if (!first_packet && file_stream->parent.stream_id != stream_id) { |
| 939 | fprintf(stdout, "[error] Stream ID is changing within a stream.\n"); |
| 940 | return -EINVAL; |
| 941 | } |
| 942 | if (first_packet) { |
| 943 | file_stream->parent.stream_id = stream_id; |
| 944 | if (stream_id >= td->streams->len) { |
| 945 | fprintf(stdout, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id); |
| 946 | return -EINVAL; |
| 947 | } |
| 948 | stream = g_ptr_array_index(td->streams, stream_id); |
| 949 | if (!stream) { |
| 950 | fprintf(stdout, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id); |
| 951 | return -EINVAL; |
| 952 | } |
| 953 | file_stream->parent.stream_class = stream; |
| 954 | ret = create_stream_definitions(td, &file_stream->parent); |
| 955 | if (ret) |
| 956 | return ret; |
| 957 | } |
| 958 | first_packet = 0; |
| 959 | |
| 960 | if (file_stream->parent.stream_packet_context) { |
| 961 | /* Read packet context */ |
| 962 | ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p); |
| 963 | if (ret) |
| 964 | return ret; |
| 965 | /* read content size from header */ |
| 966 | len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("content_size")); |
| 967 | if (len_index >= 0) { |
| 968 | struct definition_integer *defint; |
| 969 | struct definition *field; |
| 970 | |
| 971 | field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index); |
| 972 | assert(field->declaration->id == CTF_TYPE_INTEGER); |
| 973 | defint = container_of(field, struct definition_integer, p); |
| 974 | assert(defint->declaration->signedness == FALSE); |
| 975 | packet_index.content_size = defint->value._unsigned; |
| 976 | } else { |
| 977 | /* Use file size for packet size */ |
| 978 | packet_index.content_size = filestats.st_size * CHAR_BIT; |
| 979 | } |
| 980 | |
| 981 | /* read packet size from header */ |
| 982 | len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("packet_size")); |
| 983 | if (len_index >= 0) { |
| 984 | struct definition_integer *defint; |
| 985 | struct definition *field; |
| 986 | |
| 987 | field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index); |
| 988 | assert(field->declaration->id == CTF_TYPE_INTEGER); |
| 989 | defint = container_of(field, struct definition_integer, p); |
| 990 | assert(defint->declaration->signedness == FALSE); |
| 991 | packet_index.packet_size = defint->value._unsigned; |
| 992 | } else { |
| 993 | /* Use content size if non-zero, else file size */ |
| 994 | packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT; |
| 995 | } |
| 996 | |
| 997 | /* read timestamp begin from header */ |
| 998 | len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_begin")); |
| 999 | if (len_index >= 0) { |
| 1000 | struct definition_integer *defint; |
| 1001 | struct definition *field; |
| 1002 | |
| 1003 | field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index); |
| 1004 | assert(field->declaration->id == CTF_TYPE_INTEGER); |
| 1005 | defint = container_of(field, struct definition_integer, p); |
| 1006 | assert(defint->declaration->signedness == FALSE); |
| 1007 | packet_index.timestamp_begin = defint->value._unsigned; |
| 1008 | } |
| 1009 | |
| 1010 | /* read timestamp end from header */ |
| 1011 | len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_end")); |
| 1012 | if (len_index >= 0) { |
| 1013 | struct definition_integer *defint; |
| 1014 | struct definition *field; |
| 1015 | |
| 1016 | field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index); |
| 1017 | assert(field->declaration->id == CTF_TYPE_INTEGER); |
| 1018 | defint = container_of(field, struct definition_integer, p); |
| 1019 | assert(defint->declaration->signedness == FALSE); |
| 1020 | packet_index.timestamp_end = defint->value._unsigned; |
| 1021 | } |
| 1022 | } else { |
| 1023 | /* Use file size for packet size */ |
| 1024 | packet_index.content_size = filestats.st_size * CHAR_BIT; |
| 1025 | /* Use content size if non-zero, else file size */ |
| 1026 | packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT; |
| 1027 | } |
| 1028 | |
| 1029 | /* Validate content size and packet size values */ |
| 1030 | if (packet_index.content_size > packet_index.packet_size) { |
| 1031 | fprintf(stdout, "[error] Content size (%zu bits) is larger than packet size (%zu bits).\n", |
| 1032 | packet_index.content_size, packet_index.packet_size); |
| 1033 | return -EINVAL; |
| 1034 | } |
| 1035 | |
| 1036 | if (packet_index.packet_size > (filestats.st_size - packet_index.offset) * CHAR_BIT) { |
| 1037 | fprintf(stdout, "[error] Packet size (%zu bits) is larger than remaining file size (%zu bits).\n", |
| 1038 | packet_index.content_size, (size_t) (filestats.st_size - packet_index.offset) * CHAR_BIT); |
| 1039 | return -EINVAL; |
| 1040 | } |
| 1041 | |
| 1042 | /* Save position after header and context */ |
| 1043 | packet_index.data_offset = pos->offset; |
| 1044 | |
| 1045 | /* add index to packet array */ |
| 1046 | g_array_append_val(file_stream->pos.packet_index, packet_index); |
| 1047 | |
| 1048 | pos->mmap_offset += packet_index.packet_size / CHAR_BIT; |
| 1049 | } |
| 1050 | |
| 1051 | /* Move pos back to beginning of file */ |
| 1052 | ctf_move_pos_slow(pos, 0, SEEK_SET); /* position for write */ |
| 1053 | |
| 1054 | return 0; |
| 1055 | } |
| 1056 | |
| 1057 | static |
| 1058 | int create_trace_definitions(struct ctf_trace *td, struct ctf_stream *stream) |
| 1059 | { |
| 1060 | int ret; |
| 1061 | |
| 1062 | if (td->packet_header_decl) { |
| 1063 | struct definition *definition = |
| 1064 | td->packet_header_decl->p.definition_new(&td->packet_header_decl->p, |
| 1065 | stream->parent_def_scope, 0, 0, "trace.packet.header"); |
| 1066 | if (!definition) { |
| 1067 | ret = -EINVAL; |
| 1068 | goto error; |
| 1069 | } |
| 1070 | stream->trace_packet_header = |
| 1071 | container_of(definition, struct definition_struct, p); |
| 1072 | stream->parent_def_scope = stream->trace_packet_header->p.scope; |
| 1073 | } |
| 1074 | |
| 1075 | return 0; |
| 1076 | |
| 1077 | error: |
| 1078 | return ret; |
| 1079 | } |
| 1080 | |
| 1081 | /* |
| 1082 | * Note: many file streams can inherit from the same stream class |
| 1083 | * description (metadata). |
| 1084 | */ |
| 1085 | static |
| 1086 | int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags) |
| 1087 | { |
| 1088 | int ret; |
| 1089 | struct ctf_file_stream *file_stream; |
| 1090 | |
| 1091 | ret = openat(td->dirfd, path, flags); |
| 1092 | if (ret < 0) |
| 1093 | goto error; |
| 1094 | file_stream = g_new0(struct ctf_file_stream, 1); |
| 1095 | ctf_init_pos(&file_stream->pos, ret, flags); |
| 1096 | ret = create_trace_definitions(td, &file_stream->parent); |
| 1097 | if (ret) |
| 1098 | goto error_def; |
| 1099 | ret = create_stream_packet_index(td, file_stream); |
| 1100 | if (ret) |
| 1101 | goto error_index; |
| 1102 | /* Add stream file to stream class */ |
| 1103 | g_ptr_array_add(file_stream->parent.stream_class->streams, |
| 1104 | &file_stream->parent); |
| 1105 | return 0; |
| 1106 | |
| 1107 | error_index: |
| 1108 | if (file_stream->parent.trace_packet_header) |
| 1109 | definition_unref(&file_stream->parent.trace_packet_header->p); |
| 1110 | error_def: |
| 1111 | ctf_fini_pos(&file_stream->pos); |
| 1112 | close(file_stream->pos.fd); |
| 1113 | g_free(file_stream); |
| 1114 | error: |
| 1115 | return ret; |
| 1116 | } |
| 1117 | |
| 1118 | static |
| 1119 | int ctf_open_trace_read(struct ctf_trace *td, const char *path, int flags) |
| 1120 | { |
| 1121 | int ret; |
| 1122 | struct dirent *dirent; |
| 1123 | struct dirent *diriter; |
| 1124 | size_t dirent_len; |
| 1125 | |
| 1126 | td->flags = flags; |
| 1127 | |
| 1128 | /* Open trace directory */ |
| 1129 | td->dir = opendir(path); |
| 1130 | if (!td->dir) { |
| 1131 | fprintf(stdout, "[error] Unable to open trace directory.\n"); |
| 1132 | ret = -ENOENT; |
| 1133 | goto error; |
| 1134 | } |
| 1135 | |
| 1136 | td->dirfd = open(path, 0); |
| 1137 | if (td->dirfd < 0) { |
| 1138 | fprintf(stdout, "[error] Unable to open trace directory file descriptor.\n"); |
| 1139 | ret = -ENOENT; |
| 1140 | goto error_dirfd; |
| 1141 | } |
| 1142 | |
| 1143 | /* |
| 1144 | * Keep the metadata file separate. |
| 1145 | */ |
| 1146 | |
| 1147 | ret = ctf_open_trace_metadata_read(td); |
| 1148 | if (ret) { |
| 1149 | goto error_metadata; |
| 1150 | } |
| 1151 | |
| 1152 | /* |
| 1153 | * Open each stream: for each file, try to open, check magic |
| 1154 | * number, and get the stream ID to add to the right location in |
| 1155 | * the stream array. |
| 1156 | */ |
| 1157 | |
| 1158 | dirent_len = offsetof(struct dirent, d_name) + |
| 1159 | fpathconf(td->dirfd, _PC_NAME_MAX) + 1; |
| 1160 | |
| 1161 | dirent = malloc(dirent_len); |
| 1162 | |
| 1163 | for (;;) { |
| 1164 | ret = readdir_r(td->dir, dirent, &diriter); |
| 1165 | if (ret) { |
| 1166 | fprintf(stdout, "[error] Readdir error.\n"); |
| 1167 | goto readdir_error; |
| 1168 | } |
| 1169 | if (!diriter) |
| 1170 | break; |
| 1171 | /* Ignore hidden files, ., .. and metadata. */ |
| 1172 | if (!strncmp(diriter->d_name, ".", 1) |
| 1173 | || !strcmp(diriter->d_name, "..") |
| 1174 | || !strcmp(diriter->d_name, "metadata")) |
| 1175 | continue; |
| 1176 | ret = ctf_open_file_stream_read(td, diriter->d_name, flags); |
| 1177 | if (ret) { |
| 1178 | fprintf(stdout, "[error] Open file stream error.\n"); |
| 1179 | goto readdir_error; |
| 1180 | } |
| 1181 | } |
| 1182 | |
| 1183 | free(dirent); |
| 1184 | return 0; |
| 1185 | |
| 1186 | readdir_error: |
| 1187 | free(dirent); |
| 1188 | error_metadata: |
| 1189 | close(td->dirfd); |
| 1190 | error_dirfd: |
| 1191 | closedir(td->dir); |
| 1192 | error: |
| 1193 | return ret; |
| 1194 | } |
| 1195 | |
| 1196 | static |
| 1197 | struct trace_descriptor *ctf_open_trace(const char *path, int flags) |
| 1198 | { |
| 1199 | struct ctf_trace *td; |
| 1200 | int ret; |
| 1201 | |
| 1202 | td = g_new0(struct ctf_trace, 1); |
| 1203 | |
| 1204 | switch (flags & O_ACCMODE) { |
| 1205 | case O_RDONLY: |
| 1206 | if (!path) { |
| 1207 | fprintf(stdout, "[error] Path missing for input CTF trace.\n"); |
| 1208 | goto error; |
| 1209 | } |
| 1210 | ret = ctf_open_trace_read(td, path, flags); |
| 1211 | if (ret) |
| 1212 | goto error; |
| 1213 | break; |
| 1214 | case O_RDWR: |
| 1215 | fprintf(stdout, "[error] Opening CTF traces for output is not supported yet.\n"); |
| 1216 | goto error; |
| 1217 | default: |
| 1218 | fprintf(stdout, "[error] Incorrect open flags.\n"); |
| 1219 | goto error; |
| 1220 | } |
| 1221 | |
| 1222 | return &td->parent; |
| 1223 | error: |
| 1224 | g_free(td); |
| 1225 | return NULL; |
| 1226 | } |
| 1227 | |
| 1228 | static |
| 1229 | void ctf_close_file_stream(struct ctf_file_stream *file_stream) |
| 1230 | { |
| 1231 | ctf_fini_pos(&file_stream->pos); |
| 1232 | close(file_stream->pos.fd); |
| 1233 | } |
| 1234 | |
| 1235 | static |
| 1236 | void ctf_close_trace(struct trace_descriptor *tdp) |
| 1237 | { |
| 1238 | struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent); |
| 1239 | int i; |
| 1240 | |
| 1241 | if (td->streams) { |
| 1242 | for (i = 0; i < td->streams->len; i++) { |
| 1243 | struct ctf_stream_class *stream; |
| 1244 | int j; |
| 1245 | |
| 1246 | stream = g_ptr_array_index(td->streams, i); |
| 1247 | if (!stream) |
| 1248 | continue; |
| 1249 | for (j = 0; j < stream->streams->len; j++) { |
| 1250 | struct ctf_file_stream *file_stream; |
| 1251 | file_stream = container_of(g_ptr_array_index(stream->streams, j), struct ctf_file_stream, parent); |
| 1252 | ctf_close_file_stream(file_stream); |
| 1253 | } |
| 1254 | |
| 1255 | } |
| 1256 | g_ptr_array_free(td->streams, TRUE); |
| 1257 | } |
| 1258 | closedir(td->dir); |
| 1259 | g_free(td); |
| 1260 | } |
| 1261 | |
| 1262 | void __attribute__((constructor)) ctf_init(void) |
| 1263 | { |
| 1264 | int ret; |
| 1265 | |
| 1266 | ctf_format.name = g_quark_from_static_string("ctf"); |
| 1267 | ret = bt_register_format(&ctf_format); |
| 1268 | assert(!ret); |
| 1269 | } |
| 1270 | |
| 1271 | /* TODO: finalize */ |